In brief:
?cataplexy

Intense emotion of any kind can prompt a knee-buckling - like your muscles are about to give out.

Occasionally it can even involve the neck and head. This can be a symptom of narcolepsy. If you also experience hallucinations upon falling asleep - actually in the twilight before sleep - or upon awakening consider it. Also includes sleep paralysis and nap attacks. Diagnosis - multiple sleep latency.

In brief:
?cataplexy

Intense emotion of any kind can prompt a knee-buckling - like your muscles are about to give out.

Occasionally it can even involve the neck and head. This can be a symptom of narcolepsy. If you also experience hallucinations upon falling asleep - actually in the twilight before sleep - or upon awakening consider it. Also includes sleep paralysis and nap attacks. Diagnosis - multiple sleep latency.
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